Milking-machine



M. LEITCH.

MILKING MACHINE.

APPLICATION FILED FEB. Is, I915.

H I m 1 I y u 7 p w X I u 1 Z r m i K MN I. w \&L-\\ JII K s x Z Q 6 5 Y/ F P w 1 1 v MILKIN'G MACHINE. I APPLICATiON FILED FEB. 16, H5.

Patented Aug. 29, 1916.

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MEREDITH LEIZLCH, or ronenKEE'rsIn NEW YORK, Assrenon TO THE DE LAVAL I sErAEA'ron COMPANY, A conrommrron or NEW JERSEY.

MILKING-MACHINE.

Spcificationof Letters Patent.

Patented Aimee, 1916..

Application 'filed. February 18, 1915. Serial No. 8,457

To aZZ- whom may concern Be it known that '1, M' iuiorru LErrcH, a citizen-of the United States, residing at Poughkeepsie, county of Dutchess, .and Statoof New York, have iin'entedn new and useful Improvement inlililking-Machines-of 'which the following is. a full, clear, andexact description, reference being hadto the accompanying drawings, which form a part of thisspecilicetion. I

My invention relates to cow milking niachines of the type having two chambered In a patent issued to me Dec. 'l9l5,'No. 1,163,161, onv an application f ci even date herewith,-Seria'l No. L ii'ha'y'e 2:; forthaniachine in which, a; single cylinder pump or its erpiivalent performs the functions of both an exhaustei tor the-milk pail and inner teat -cup "chamber. and a pulsator for producing pulsations inthe outer teat cup chamber. In anotherapplication, Se

rial No. 8e56, l have set forth an improve I ment on said machine, n which means are provided to produce pulsations 1n the lnner teat' cup chamber. and the milk discharge therefrom to the inilkfpail by intermittently admitting measured volumeso'f air to break the vacuum. this result .heing accomplished by means of a valve whose operation is con- "trolled from the pump. T he presentinvention has for its object to pertectthe construe,-

tion of the last named application. Again,

' in the last named application, the vacuum in the milk discharge is reduced twice to each compressionvot the teats. l n the rent application, the construction is such that the vacuum is broken only once per cycle.

A preferred embodiment of the invention shownin the accompanying drawings, n

which- I vFigure 1' IS a vertical sectional vlewof the secondary pulsutor, on the line 1--1 Fig. 2. Fig. 2 a plan view of the p ulsator. Fig. 3 is a partial vertical section on the line 3- of Fig. *2. Fig. l is a diagrammatic view oi a complete installation comprising one unit. v

A claw u/has a cent :11 chamber 5 from which project tour tubcsc adapted to connect to flexible extensions (Z from the inner or teat receiving chambers of the teat cups 10 and one tube 72, adapted to connect to n flexible tube ileading to the milkpail 51'. Separated from the chamber 6 by a flexible other materialsuit: ible for filtering eir 'drawn mto the cylinder.

diaphragm n is a second chamber '6 having extensions from which project 'four tubes 7, adapted tO-belconnected'by flexible pipes g wltll the outer chambers of the teat cups 10. From-the same chamber c a single tube 11 is provided for connection to'a source of pneu- 1 na-tic pulsations. The diaphragm /i is held in place by a spider 0 forced upward by the plug which screws into the bottom of the claw and forms the lower sideof the chamher. a. ,Thc'upper side of the chamber 1) is formed by a flange on .the lower end of a cylinder Z in which reciprocate's a piston valve The piston alve mhas a central bore 7* communicatingby ports .9 with an annulargroove t and has also 'an annular erect-en. Throughithe wall of the cylinder reports. a; and 50 providing communicahet-ween the bore ofthe' cylinder and an air chamber or reservoir z surrounding the cylinder. ,Above the cylinder Z and separated from it by a perforated plate isa small chamber -v filled with absorbent cotton or A flexible tube 12 connects the tube 11 with a pipe 13 leading item the milk pail to the stanchion pipe line 14; At 15 is a check valve allowing air to pass fron'r the milk pail toward the pipe 13 but preventing its return.

- The pipe line lehas cocks 16 and pipe connections at'the stanchions. A pump. cylinder 17 is connected to the pipe line 14 and t has anair discharge. Valve 18. If'i't is desired that the compression or the teats lpe quickand snappy a port 19 is provided in the pump cylinder so'lo'cated that asthe. piston 20 nears the end of its suction stroke, it will be uncovered and allow a sudden rush of ai at atmosphericpressureinto the system. If a slow application of pressure is'desired this port isomitted and the compres sion takes place gradually as the pumppiston moves on its compression stroke.

The operation is'as follows: After the pipe 13 is connected to. the line 14 and the cock 16 opened, the pump on each suction sti'okedraws air from the pipes ll, 13, 12, the pail j'and the pipe 2'. On the compres: sion stroke air is returned into the pipes 14:, .13, 12 till the pressure exceeds-that of the atmosphere enough to ,l'iftithe Valve 18 and allow the excess airto escape. After a few.

strokes of the-pump the Vacuum in the pail ries during each cycle from atmospheric tothe maximum vacuum. obtainable with the pump. gDuring the suction stroke of the pump the air is exhaustedv f rom the cha1nher 6 to the same extent as from the chamber' b, so that the diaphragmn is. free, and

atmospheric pressure acting on top ofthe piston valve m forces it down to the position shown. Air previously stored in the reser voir g now escapes through theports a and groove, u into the chamber t, thus momentarily vbreaking'the vacuum inthis chamber and in the inner chambers of the connected teat cups.- At the same time the outer chambers of theteat cups are, because of their connection with the chamber 6, exhausted to p the full vacuum and the flexible partition is expanded to its full size, allowing the teat to fill with milk and at the sametime be drawn down into the teat cup. The air and milk soon pass from the chamber Z) through the pipe i to the pail and the air is drawn oil through the check valve 15 and the pipes 13 and 14. On the compression stroke of the pump air coming back through the pipes ll and 13 is prevented, by the check valve 15 'from reaching the pail j but by the pipe 12 enters the chamber 6. Through the extensions c and tubes 7 and'g it reaches the outer chamber of the teat cups and, because the inner chamber 'is connected through the pipes (Z and c, the chamber 6 and the pipes h and i with the milk pail constantly under suction, it causes the flexible partition to collapse and compress the teat forcing the milk out. At the same time the pressure acting under the diaphragm a forces it and the piston valve on up. The lower edgeof the groove it closes theport as and later the diaphragm a, touching the circular bead around'the lower end of the cylinder Z, seals the opening so as to prevent any leak. The annular groove t uncovering the port 02 allows air, coming through the filter 9, the

cylinder Z, the bore 1', and the port 8, to fill the reservoir y ready for the next cycle.

It is readily seen that the teats are subjected simultaneously to a squeeze and a maximum suction and alternating with this a release accompanied by a reduction of suction.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. In a. milking machine, in combination, a double chambered teat cup, a pipe leading to the outer chamber of the teat cup and through which pressure fluid is admitted to and exhausted from the outer teat cupchamber to produce pulsations therein, a milk discharge, constantly-"under suction, from the innerchamberof the teat cup, said.

milk discharge being closed against admission of pressure fluid from said pipe, and means to admit pressure fiuid'irom another source to the milk discharge at intervals corresponding to the number of said pulsa tions. s

-2.- In a! milking machine, in combination, a double chambered teat cup, a pipe leading to the outer chamber. of the teat cup and through which pressure fiuid'is admitted. to and exhausted from the outer teat cup chamber to produce pulsations therein, a milk discharge from the inner chamber of the teat cup constantly under and in communication with a source of suction, said milk discharge being closed against admission of pressure fluid from said pipe, and means to admit pressure fluid from another source to the milk discharge alternately with the adm'is sion of pressure fluid to the outer teat cup chamber and to exclude admission of pressure fluid to the milk discharge during the remainder of each pulsation.

3. In a milking machine, in combination, a double chambered teat cup, a pipe leading to the outer chamber of the teat cup and through which pressure fluid is admitted to and exhausted from the outer teat cup chamher to produce pulsations therein, a milk discharge from the inner teat cup chamber constantly under suction, asource of pressure supply independent of the outer teat cup chamber, a valve adapted in its movement toalternately connect and disconnect the milk discharge with said pressure supply, and means to actuate the valve to effect such connection at intervals corresponding-t0 the number of said pulsations.

4. In a milking machine, in combinati a. double. chambered teat cup, a claw having a pulsation chamber connectible to the outer teat cup chamber and to and from which pressure fluid is alternately admitted and exhausted to produce pulsations, an inde-. v pendent milk receiving vchamber in said claw connectible with the inner teat cup chamber and adapted to be placed under continuous suction, a source of pressure fluid supply independent of the pulsation chamber, a valve adapted in its movementifi to alternately connect and disconnect the milk discharge with said pressure supply, and means to actuate the valve to effect such connection atintervals correspomling to the number of said pulsations.

In a milking machine, in combination,

'a double chambered teat cup, a pipe leading to the outer chamber of the teat cup and through which pressure fluid is alternately admitted and exhausted to produce pulsations therein, milk discharge from the inner teat cup chamber, a valve, pipe leading to the valve, and common pulsating means to maintain continuous suction in the milk discharge and to produce pulsations said pulsations.

in the last named pipe to control the operation of the valve, said valve adapted in its movement to admit to the milk discharge pressure fluid from a source of supply independent of the outer teat cup chamber at intervals corresponding to the number of 6. In a milking machine, in combination, a double chambered teat cup, a pipe leading to the outer chamber of the teat cup and through which pressure fluid is admitted to and exhausted from the outer teat .cup chamber to produce pulsations therein, a milk discharge, constantly under suction, from the inner chamber of theteat cup, an air reservoir independent of the outer teat cup chamber, anair valve adapted in its movement to.connect said reservoir with the milk discharge simultaneously with the exhaustion of pressure fluid from the outer teat cup chamber -and to close said connection and connect said reservoir with the .atmosphere simultaneously with the admission of pressure fluid to the outer teat cup chamber, and meansto'operate the valve.

7. In a. milking machine, in combination, a double chambered teat cup,- a milk discharge from the inner teat cup chamber, common pulsating means to produce continuous suction in the milk discharge and pulsations in the outer chamberof the teat cup so as to intermittently compress the teat, and separate means 'controlled'by the first means to reduce the vacuum in the'milk discharge at intervals corresponding to said pulsations.

8. In a milking machine, in combination, a double chambered teat cup, a milk discharge from the inner teat cup chamber, common pulsating means to produce continuous suction in the milk discharge and pulsations in the outerch amber of the teat cup so as tointermittently compress the teat, and an air valve controlled bysaid means to admit pressure fluid to the'milk discharge simultaneously with the reduction of pressure in the outer teat cup chamber and to close the admission of pressure fluid to the milk discharge sinu'lltaneously with the increase of pressure in the outer teat.

simultaneously with said release and to close the admission of pressure fluid to the mis dischargesimultaneously with said compression.

10. In a milking machine, in combination, a double chambered teat cup, a milk discharge from the inner chamber thereof, a

operation of the valve controlled, said valve in its movement adapted to admit pressure fluid to the milk discharge simultaneously withsaid release and to close the admission of pressure fluid to the milk discharge simultaneously with said compression, and a. non-return valve between said pipe and the milk discharge.

11. In a milking machine, in combination, a double chambered teat cup, a milk dischargefrom the inner chamber thereof, a pneumatically operable valve,means to produce pneumatic pulsations, a pipe through which said pulsations are transmitteddirect to the outer teat cup chamber and to the valve whereby theteat may-be alternately compressed andreleased'and the operation of the valve controlled, and an air reservoir, said valve in its movement adapted to connect said reservoir and milk discharge simultaneously with said release and to close said connection and connect said reseri'oi'r with the atmosphere simultaneously; ivithsaid compression.

12. In a milking machine, in combination, a double chamberedteat cup, a 'milkdischarge from'the inner chamber thereof, a pneumatically operable valve, means to pro;

dime pneumatic pulsations, a pipe through Wl1lCh said pulsations are transmitted direct to the outer teat cup chamber and to the valve whereby the teat may be alternately compressed and released and the operation of the valve controlled, a non-return valvebetween said pipe and the milk discharge,'and an air reservoir, said valve inits nio'vemcnt adapted to connectsaid reservoir and milk discharge simultaneously with said release III? and to close said connection and connect said reservoir with the atmosphere simultaneously with said compression.

13. In amilking machine, in combination, a double chambered teat'cup, a pulsator comprising a casing, a flexible diaphragm there in separating two chambers,- one a pulsation chamber and the other a milk receiving chamber, a passage between the milk receiving chamber and the inner teat cup chamber,

a passage between the pulsation chamber and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations .1n the pulsation chamber, and a valve movtermittently admit pressure fluid to the milk receiving chamber.

11 In a milking machine, in combination a double chambered teat cup, a pulsator comprising a casing, a-tlexible diaphragm therein separating two chambers, one a pulsation chamber and the other a milk receiving chamber, a passage between the milk receiv ing chamber and the inner teat cup cham her, apassage between the pulsation chamher and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations in the pulsation chamber, a valve chamber communicating with the milk receiving chamber and witlrthe atmosphere, and a valve in said chamber movable with the diaphragm andadapted to intermittently admit pressure fluid to the milk receiving chamber,

15. In a milking machine, in combination, a double chambered teat cup, a pulsator comprising a casing, a flexible diaphragm therein separating two chambers, one a pulsation chamber and the other a milk receiving chamber, a passage between the milk receiv- "mg chamber and the inner teat cup chamber,

a passage between the pulsation chamber and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations in the pulsation chamber, a valve chamber communicating with the milk receiving chamber and with the atmosphere, an air reservoir, and a valve in said chamber movable with the diaphragm and adapted to alternately connect said reservoir with the milk receiving chamber and with the atmosphere.

16. In a milking machine, in combination,.

a double chambered teat cup. :1 pulsator comprising a casing, a flexible diaphragm therein separating two chambers, one a pulsation chamber and the other a milk receiving chamber, a passagebetween the milk receiving chamber and the inner teat cup chamber, a passage between the pulsation chamber and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations in the pulsation chamber, an-air admission passage to the milk receiving chamber, and a valve movable with the diaphragm and adapted to intermittently open said passage, said diaphragm adapted at one end of its movement to effectually seal said passage.

17. In a milking machine, in combination, a double chambered teat cup. a pulsator comprising a casing, a flexible diaphragm therein separating two chambers, one a pulsation chamber and the other a milk receiving chamber. a passage between the milk receiving chamber and the inner teat cup chamher, a passage between the pulsation chamber and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations 1n the pulsation chamber, a valve chamber communicating with the milk receiving chamber and with the atmosphere, an air reservoir, and a valve movable with the diaphragm and adapted to alternately connect I said reservoir with the milk receiving chamber and with the atmosphere, said diaphragm adapted at one end of its movement to etl'ectually seal the connection between the reservoir and the milk receiving chamber.

18. In a milking machine, in combination, a double chanmered teat cup, a pulsator comprising a cising, a flexible diaphragm there-in separating two chambers, one a pul-' sation chamber and the other a milk receiving chamber, a passage between the milk receiving chamber and the inner teat cup chamber, a passage between the pulsation chamber and the outer teat cup chamber, means to produce continuous suction in the milk receiving chamber and pneumatic pulsations in the pulsation chamber, a valve chamber connnunicating with the milk receiving chamber and with the atmosphere, an air reservoir adjacent the valve chamber, portsbetween' the reservoir and valve chamher, and a valve movable with the diaphragm and having cut away parts through which and said ports the reservoir is alternately connected with the atmosphere and with the milk receiving chamber.

19. In a milking machine, in combination, a double chambered teat'cup, a pulsator comprising a casing, a flexible diaphragm therein separating two chambers, one a pulsation chamber and the other a milk receiving chamber, a passage between the milk receiving chamber and the inner teat cup chamber, a passage between the pulsation chamber and the outer teat cup chamber,

meansto produce continuous suction-in the milk receiving chamber-and pneumatic pulsations in the pulsation chamber, a valve chamber communicating with the milk receiving chamber and with the atmosphere, an air reservoir adjacent the valve chamber, ports between the reservoir and valve chamber, and a valve movable with the diaphragm and having cut away parts through which and said ports the reservoir is alternately connected with the atmosphere and with the milk receiving chamber, said diaphragm adapted at one end of its movement 4 to effectually seal the opening between the valve chamber and milk receiving chamber and prevent leakage to the latter around the valve from the air reservoir.

20. In a milking machine, in combination, a source of pneumatic pulsations, a set of double chambered teat, cups, a pulsator having a pulsation chamber connected with the outer chambersof said teat cups and with voir "alternately with the atmosphere andwith sai'd milk receiving chamber, and a 10 flexible diaphragm movablevwith the valve and adapted atone end of the valves movement' to effectually seal'the passages so as to pprevent anyleak from said air reservoir to the milkreceiving chamber;

QL A milking machine pul satorfor use with double chambered teat cups, comprising a pulsationchamber connectible with the outer chambers of the teat-cups, .a milk re- ,ceiving chamber 'conneotible with the inner 29 chambers of the teat'cups and constantly'in communication with a source of suction, a flexible diaphragm separating the' pu'lsation chamber from-the milk-receiving chamber, 'an air reservoir, and a valve movable in 25 one direction by atmospheric pressure on its end and in the other direction by; the flexible diaphragm and adapted in its movement to connect the reservoir alternately with the atmosphere and with the milk: receiving 30 chamber so as to admit measured volumes of air to cause momentary reductions in the vacuum in said milk receiving chamber; in.

"her chambers of theteatcups', 'dexih chamber so as to admit meas red. voiun' s mill: pail, a nomre'turn v combination with means to 'prcducepneu- Ina-tic pulsations in the pulsation chamber 22. it milking 'machine'pulsator for use 3 with double. chambered teat cups, co'n pris ing a pulsation chamber connectihlenith the outer chambers of the teat cups a mill: receiving chamber conn'ectible with th phragm. separating the from the milk-receiving chemo 1 ervoir, and a valve movable in one an tion by atmospheric pressure en itsv end in the other direction by the phragm and adapted in its incvemei connect the reservoir alternately the atmosphere and with-the mill: receiving air to cause momentary reductiene vacuum in said mill: receiving ch combination with mill: the mill: receiving chamber, ed with the pulsation chem the last" jail and means said pipe named connection to to produce pneumatic In testimony of e r l have hereunto set my hand, Pang ikeepsie, N. Y., on this 30thdaiy of .la n 1915? BEEREEITXF BITCH illitnesses:

CHARL S L. Pownnn, EDWARD F, Wain-in. 

